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AUSCERT External Security Bulletin Redistribution
ESB-2021.0134.2
Cisco Jabber and Webex Client Software Shared File
Manipulation Vulnerability
17 June 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Jabber
Cisco Webex Teams
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1242
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-teams-7ZMcXG99
Revision History: June 17 2021: Cisco Jabber added as a vulnerable product
January 14 2021: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Jabber and Webex Client Software Shared File Manipulation Vulnerability
Priority: Medium
Advisory ID: cisco-sa-webex-teams-7ZMcXG99
First Published: 2021 January 13 16:00 GMT
Last Updated: 2021 June 16 15:29 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvv74842 CSCvy06013
CVE Names: CVE-2021-1242
CWEs: CWE-450
Summary
o A vulnerability in Cisco Jabber and Cisco Webex (formerly Teams) could
allow an unauthenticated, remote attacker to manipulate file names within
the messaging interface.
The vulnerability exists because the affected software mishandles character
rendering. An attacker could exploit this vulnerability by sharing a file
within the application interface. A successful exploit could allow the
attacker to modify how the shared file name displays within the interface,
which could allow the attacker to conduct phishing or spoofing attacks.
Cisco has released software updates that address this vulnerability. There
are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-teams-7ZMcXG99
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected the following Cisco
products:
Webex Teams releases earlier than Release 40.12.0.17293
Jabber releases earlier than 12.9.6 and 14.0.1
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o When considering software upgrades , customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories page , to determine exposure and a complete
upgrade solution.
In all cases, customers should ensure that the devices to be upgraded
contain sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release.
If the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
Fixed Releases
At the time of publication, the following Cisco products contained the fix
for this vulnerability:
Webex (formerly Teams) releases 40.12.0.17293 and later
Jabber releases 12.9.6 and later and 14.0.1 and later
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Exploitation and Public Announcements
o The Cisco Product Security Incident Response Team (PSIRT) is not aware of
any public announcements or malicious use of the vulnerability that is
described in this advisory.
Source
o Cisco would like to thank Hou JingYi of Qihoo 360 CERT for reporting this
vulnerability.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-teams-7ZMcXG99
Revision History
o +---------+-----------------+----------------------+--------+-------------+
| Version | Description | Section | Status | Date |
+---------+-----------------+----------------------+--------+-------------+
| | Added Cisco | Title, Summary, | | |
| 1.1 | Jabber as a | Vulnerable Products, | Final | 2021-JUN-16 |
| | vulnerable | and Fixed Software | | |
| | product. | | | |
+---------+-----------------+----------------------+--------+-------------+
| 1.0 | Initial public | - | Final | 2021-JAN-13 |
| | release. | | | |
+---------+-----------------+----------------------+--------+-------------+
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